Composition-body brake-shoe.



H. JONES.

COMPOSITION BODY BRAKE SHOE. APPLICATION FILED AUG-25,1913.

1,156,689. Patented Oct. 12, 1915.

A TTOR/VEY sTAr s PAT N OFFICE.

HARRY JONES, or surrnnmynuw AssIeNorc ro-AMEmoAN BRAKE SHOE &

. rou'rmmr COMPANY, or MAH AH; unwgJ'ERsEY, a CORPORATION or NEW JERSEY.

comrosijirion ropr' RAKE-siren.

Specification of Letters Patent,

I Patented Oct. 12, 1915.

- Applicati oii'flled-August a5, 1913. Serial 11b.- 7se,433.

To all whom it mag concern.

Be it known that I, HARRY Jam, a citizen of the United States, and aresident of Sufi'ern, in the county of Rockland and State of New York,have made and invented vcertain new and useful Improvements inComposition-Body Brake-Shoes, of which the following is a specification.

My-invention. relates to an improvement in brake shoes, and moreparticularly to that type orstyle thereof commonly known and referred toas a composition or filled shoe.

Brake shoes of this type require a casing, shell or other support, of aform appropriate to hold the composition or body material, in order toprevent the latter from breaking or crumbling while the shoe is in use,and during transportation. This supporting member, usually designed moreparticularly for the purpose of holding the body material rather than toassist in any way in the frictional qualities of the shoe, is usuallymade in the form of a shell, either being cast in that form, or pressedor stamped up from sheet metal, the ends, sides and top being generallymade integral. In the shell is contained the frictional material,preferably a composition, which, contacting with the tread of the wheel,gradually. wears away while the shoe is in service. As the sides andends also contact with the tread of the wheel, they wearaway with thebody.

the sides and ends, with the remaining por-v tionof the body, is thenscrapped or discarded as unfit for further service, this scrap,comprising largely the metal back,

entailing a material loss.

The object of my invention is to so construct the shell, or equivalentsupport, that the back proper thereof, which forms the -greater portionof the shell, may be used repeatedly, the end pieces or end lugs, whichare partially worn away in service, being removedfrom the back and newones substituted therefor, the back itself being thus saved, and, afternew ends have been applied thereto, used again as a support for a newbody portion.

More specifically stated, my invention includes a brake shoe back of thetype above referred to in which the end pieces or end blocks are securedto the back of the shoe being cast thereupon, this being accomplishedbyplacing the back in a suitable With the above and other objects'inview,

' my invention consists in the improved brake shoe, and back therefor,illustrated in the accompanying drawing and hereinafter described andclaimed, and in such variations and modifications thereof as will beobvious to those skilled in .the art to whichmy invention relates.

omitted, this view being taken upon a central plane extendinglongitudinally of the shoe. Fig. 3 is a view showing a section of myimproved brake shoe and back therefor, this view being a section taken.upon a longitudinally extending plane indicated by the line -3-3, Fig.1, and Fig. 4 is a view showing asection taken upon a transverse planeindicated by the line 4 4, Fig. 2.

The back proper 5 of my improved brake shoe, is made preferably from asuitable blank cut from a plate of wrought iron or mild steel of athicknessof approximately three-sixteenths of an inch, the blank beingproperly shaped to produce the back, as will be understood. In the formof my invention illustrated, the back is provided with a centrallyarranged key lug whereby the shoe may 'be secured to a suitable brakehead,

this key lug being shown as made integral with the back, although it maybe made separate if desired and secured thereto as my invention is in noway concerned with the particular construction of key lug. The back ispreferably provided with depending side flanges 7 whereby the bodyportion of the shoeis more securely anchored to the back. 7

The reference numeral 10 designates the renewable end piecesor fendblocks of my improved. brake, shoe, thesame being madet'. v I

from cast metal and secured'tothe back by being cast thereupon, this.being accomplished by placingtheback in a suitable mold and pouring themolten metal from which the ends are formed thereinto, whereupon themetal of the ends flows around and embeds the ends of the back in theend blocks. In order" to insure the permanent but destructiblesecurement of the cast ends to the back, the latter is provided with theopenings 7 adjacent its remote ends, through which the metal of the endsflows, and at the same time, a lug 9 is formed against which the brakehead may rest. These end blocks which project toward the Wearing face ofthe shoe and Worn away simultaneously with the body portion, arepreferably provided with lugs 8 and 9 formed integral therewith, whichstops or lugs are engaged by the ends of a brake head to thereby supporttheends of the shoe in accordance with the usual practice in such cases.

The body portion 11 of my improved brake shoe is made from a suitablenon-metallic or semi-metallic composition, pressed into place upon theback and between the end blocks 10, as by means of'a suitable presswhereby the body portion of the shoe is forced into intimate contactwith the back along its entire length and with the renewable end blocks10, to thereby hold the body' portion in place.

From the foregoingit will be understood that after the brake. shoe hasbeen worn down in service until it is so thin asto be no longer-capableof use, and the end pieces 10 partially Worn away, the remaining portionof the composition body portion is separated from theback 5, and theremaining portion of the end blocks also broken away; this being easilyaccomplished because of the fact that said blocks are made of castmetal. The back may be then placed in a suitable mold, as aboveexplained, new end blocks, corresponding with the blocks 10, castthereon, and the new shell or casing refilled with a composition bodyportion.

Having thus described and explained my invention, I claim and desire tosecure by Letters Patent: p

1. A back for a brake shoe comprising a back proper and renewable endpieces separate from said back and secured thereto by casting the samethereon.

2. In a brake shoe, asupporting back; blocks formed from cast metal andsecured to said back by being cast thereon, and which blocks extendtoward the wearing face of the shoe; and a mass of material supported bysaid back and filling the space between said blocks.

3. In a brake shoe, a supporting back;

end pieces formed from cast metal and secured one to each end of saidback by being cast thereon, whereby the ends of the back become embeddedin the end pieces, and which latter extend to the wearing face of theshoe; and a mass of material supported by said back and filling thespace between said end pieces.

4. Ina brake shoe, a supporting back; end pieces formed from cast metaland secured one to each end of said back by being cast thereon, whereby.the ends of the back become embedded in the end pieces, and which latterextend to the wearing face of the shoe and are provided with'integrallyformed lugs adapted to be engaged by the ends of 'a brake head; and amass of material supported by saidback and filling the space betweensaid end pieces.

5. In a brake shoe, a supporting back formed from sheet metal and havingdown- Wardly extending side flanges; end pieces formed from cast metaland securedone to each end of said back by being cast thereon, wherebythe ends of'the back become embedded in the end pieces, and which endpieces extend to the wearing face of the shoe; and a mass of materialsupported by said back and filling the space between said end pieces.

6. In a brake shoe, a supporting back formed from sheet metal and havingdownwardly extending side flanges; end pieces formed from cast metal andsecured one to each end of said back by being cast thereon, whereby theends of the back-become embedded in the end pieces, and which end piecesextend-to the Wearing face of the shoe and are provided with lugsadapted to be engaged by the ends of a brake head; and a mass ofmaterial supported by'said back and filling the space between said endpieces.

7. A back for a brake shoe comprising a metal plate provided with a keylug intermediate its ends and with openingsadjacent the plate ends, endpieces of cast metal located at the ends of said plate and embedding thesame therein, the metal of said end pieces extending through theopenings in said back plate and forming brake head engageable lugsthereby, said end pieces fixedly and destructibly secured to said plate.

Signed at Sufl'ern. in.the county of Rockland and State of New York,this 19th day of August, A. D. .1913.

HARRY JONES.

Witnesses lBnNJ. .B. S'rnnBiNs, ALFRED 118.. RoNK.

